5656156217 has 2 divisors, whose sum is σ = 5656156218. Its totient is φ = 5656156216.

The previous prime is 5656156123. The next prime is 5656156223. The reversal of 5656156217 is 7126516565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3134208256 + 2521947961 = 55984^2 + 50219^2 .

It is a cyclic number.

It is not a de Polignac number, because 5656156217 - 2¹⁴ = 5656139833 is a prime.

It is a super-2 number, since 2×5656156217² = 63984206302215502178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5656156267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2828078108 + 2828078109.

It is an arithmetic number, because the mean of its divisors is an integer number (2828078109).

Almost surely, 2^5656156217 is an apocalyptic number.

It is an amenable number.

5656156217 is a deficient number, since it is larger than the sum of its proper divisors (1).

5656156217 is an equidigital number, since it uses as much as digits as its factorization.

5656156217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378000, while the sum is 44.

The square root of 5656156217 is about 75207.4212893914. The cubic root of 5656156217 is about 1781.7241444467.

The spelling of 5656156217 in words is "five billion, six hundred fifty-six million, one hundred fifty-six thousand, two hundred seventeen".